A plane takes off at McCarran International airport, Thursday, March 19, 2020, in Las Vegas.   Officials at  the airport said in a tweet that it will remain open with reduced operations after an air traffic controller tested positive late Wednesday, temporarily closing the control tower.  (AP Photo/John Locher)

A plane takes off at McCarran International airport, Thursday, March 19, 2020, in Las Vegas. Officials at the airport said in a tweet that it will remain open with reduced operations after an air traffic controller tested positive late Wednesday, temporarily closing the control tower. (AP Photo/John Locher) by AP